日本金属学会誌

J. Japan Inst. Metals, Vol. 2, No. 2 (1938),
pp. 44-50

An Investigation of the Corrosion of Magnesium Alloys (7th Report)

Susumu Morioka1, Tuneyuki Saito1

1東北帝大金屬材料研究所

Abstract:

The effect of addition of Mn, Mn+Si or Al+Mn on the corrosion of magnesium ternary alloys, Mg-Zn-Sn, Mg-Sn-Pb, Mg-Zn-Cd or Mg-Sn-Cd which according to the 4th report show relatively high resistance to corrosion, was studied. The following results were obtained. (1) The rate of corrosion of the ternary alloys are more or less reduced by addition of Mn in general, but a definite tendency are observed that the addition of Mn has no effect or even slightly harmful for fully high resistant alloys having a suitable composition as a ternary alloy, and the effect of Mn increases with the increasing corrosibility of alloys due to an unsuitable composition and that the amount of Mn for reducing the rate of corrosion is sufficient by about 0.5% or less in general. (2) The addition of Si up to 0.6% is harmful. (3) For alloys containing too little Mn addition of Al is very harmful but for alloys containing about 0.5%Mn or more it has practically no effect, that is, the harmful influence of Al are fully depressed by presence of sufficient amount of Mn.


(Received 1937/06/20)

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